Study of optimizing extraction technique for Fuganning capsules by orthogonal test

Objective To optimize the best process conditions for extraction technique of Fuganning capsules.Methods The quantity of chlorogenic acid and the extraction yield of solid extracts were chosen as indexes,the orthogonal test and HPLC was used to optimize the process conditions.Results The optimal extracting condition was: presoaking in 2 h,adding 10 times of water,extracting 3 times,1 hour each time.Conclusion The optimized extraction technology is stable and efficient.